* arm.md (compare_scc): Use shorter sequence for EQ case.

(ior_scc_scc_cmp, and_scc_scc_cmp): New insn-and-split patterns.
(and_scc_scc): Ensure split only applies when there is a dominance
of the comparisons.
(and_scc_scc_nodom): New insn-and-split pattern.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@66757 138bc75d-0d04-0410-961f-82ee72b054a4